EXHIBIT 99-1

JOINT FILING AGREEMENT

In accordance with Rule 13d-1(k) under the Securities Exchange Act of 1934, as amended, the undersigned agree to the joint filing on behalf of each of them of a Statement on Schedule 13G (including any and all amendments thereto) with respect to the Common Shares of Beneficial Interest, $0.01 par value per share, of United Development Funding IV, a Maryland real estate investment trust, and further agree that this Joint Filing Agreement shall be included as an Exhibit to such joint filings.

The undersigned further agree that each party hereto is responsible for the timely filing of such Statement on Schedule 13G and any amendments thereto, and for the accuracy and completeness of the information concerning such party contained therein; provided, however, that no party is responsible for the accuracy or completeness of the information concerning any other party, unless such party knows or has reason to believe that such information is inaccurate.

This Joint Filing Agreement may be signed in counterparts with the same effect as if the signature on each counterpart were upon the same instrument.

[Signature Page Follows]

IN WITNESS WHEREOF, the undersigned have executed this Agreement as of February 14, 2019.


NEXPOINT STRATEGIC OPPORTUNITIES FUND

By: NexPoint Advisors, L.P., its investment manager

By: NexPoint Advisors GP, LLC, its general partner

	By:	/s/ Dustin Norris
		Name: Dustin Norris
		Title: Secretary

NEXPOINT ADVISORS, L.P.

By: NexPoint Advisors GP, LLC, its general partner

	By:	/s/ Dustin Norris
		Name: Dustin Norris
		Title: Secretary

NEXPOINT ADVISORS GP, LLC

	By:	/s/ Dustin Norris
		Name: Dustin Norris
		Title: Secretary

/s/ James D. Dondero
James D. Dondero

Joint Filing Agreement

United Development Funding IV SC 13G